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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * MFD core driver for the Richtek RT5033.4 *5 * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,6 * flash LED, current source, LDO and BUCK regulators.7 *8 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.9 * Author: Beomho Seo <beomho.seo@samsung.com>10 */11 12#include <linux/err.h>13#include <linux/mod_devicetable.h>14#include <linux/module.h>15#include <linux/interrupt.h>16#include <linux/mfd/core.h>17#include <linux/mfd/rt5033.h>18#include <linux/mfd/rt5033-private.h>19 20static const struct regmap_irq rt5033_irqs[] = {21 { .mask = RT5033_PMIC_IRQ_BUCKOCP, },22 { .mask = RT5033_PMIC_IRQ_BUCKLV, },23 { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },24 { .mask = RT5033_PMIC_IRQ_LDOLV, },25 { .mask = RT5033_PMIC_IRQ_OT, },26 { .mask = RT5033_PMIC_IRQ_VDDA_UV, },27};28 29static const struct regmap_irq_chip rt5033_irq_chip = {30 .name = "rt5033",31 .status_base = RT5033_REG_PMIC_IRQ_STAT,32 .unmask_base = RT5033_REG_PMIC_IRQ_CTRL,33 .num_regs = 1,34 .irqs = rt5033_irqs,35 .num_irqs = ARRAY_SIZE(rt5033_irqs),36};37 38static const struct mfd_cell rt5033_devs[] = {39 { .name = "rt5033-regulator", },40 {41 .name = "rt5033-charger",42 .of_compatible = "richtek,rt5033-charger",43 }, {44 .name = "rt5033-led",45 .of_compatible = "richtek,rt5033-led",46 },47};48 49static const struct regmap_config rt5033_regmap_config = {50 .reg_bits = 8,51 .val_bits = 8,52 .max_register = RT5033_REG_END,53};54 55static int rt5033_i2c_probe(struct i2c_client *i2c)56{57 struct rt5033_dev *rt5033;58 unsigned int dev_id, chip_rev;59 int ret;60 61 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);62 if (!rt5033)63 return -ENOMEM;64 65 i2c_set_clientdata(i2c, rt5033);66 rt5033->dev = &i2c->dev;67 rt5033->irq = i2c->irq;68 rt5033->wakeup = true;69 70 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);71 if (IS_ERR(rt5033->regmap)) {72 dev_err(&i2c->dev, "Failed to allocate register map.\n");73 return PTR_ERR(rt5033->regmap);74 }75 76 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);77 if (ret) {78 dev_err(&i2c->dev, "Device not found\n");79 return -ENODEV;80 }81 chip_rev = dev_id & RT5033_CHIP_REV_MASK;82 dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);83 84 ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,85 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,86 0, &rt5033_irq_chip, &rt5033->irq_data);87 if (ret) {88 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",89 rt5033->irq, ret);90 return ret;91 }92 93 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,94 ARRAY_SIZE(rt5033_devs), NULL, 0,95 regmap_irq_get_domain(rt5033->irq_data));96 if (ret < 0) {97 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");98 return ret;99 }100 101 device_init_wakeup(rt5033->dev, rt5033->wakeup);102 103 return 0;104}105 106static const struct i2c_device_id rt5033_i2c_id[] = {107 { "rt5033", },108 { }109};110MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);111 112static const struct of_device_id rt5033_dt_match[] = {113 { .compatible = "richtek,rt5033", },114 { }115};116MODULE_DEVICE_TABLE(of, rt5033_dt_match);117 118static struct i2c_driver rt5033_driver = {119 .driver = {120 .name = "rt5033",121 .of_match_table = rt5033_dt_match,122 },123 .probe = rt5033_i2c_probe,124 .id_table = rt5033_i2c_id,125};126module_i2c_driver(rt5033_driver);127 128MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");129MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");130MODULE_LICENSE("GPL");131